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Silver 3.5 inch enterprise hard drive with exposed circuit board and SAS connector

Seagate

Seagate Exos X16 ST16000NM004G 16TB 7200 RPM 256MB SAS 12Gb/s 3.5" internal hard drive

SKU CH-KH1G-6G5GX MPN ST16000NM004G

Enterprise SAS drive delivers 16 TB at 7200 RPM with 256 MB cache for high-capacity rack storage

  • Total capacity16 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7,200 RPM
  • Cache memory256 MB
  • Mean latency4.16 ms

Capacity 16TB

  • 16 TB capacity delivers 33 % more petabytes per rack
  • SAS 12 Gb/s interface provides 7200 RPM enterprise performance
  • 256 MB cache enables highest 16 TB hard drive performance
  • Helium sealed design lowers power and weight for reduced total cost
  • Seagate Secure features support safe and fast drive retirement

Capacity and interface

The Seagate Exos X16 ST16000NM004G is a 16TB 3.5-inch internal hard drive with a SAS 12Gb/s interface, 7200 RPM spindle speed and 256MB cache. It is built for enterprise storage environments that need maximum capacity per rack unit.

Sustained workload behaviour

Helium sealing and PowerBalance technology optimise watts per terabyte during continuous operation. Enhanced caching supports high throughput for cloud data centre and massive scale-out applications, while digital environmental sensors monitor internal conditions for consistent performance.

Installation considerations

The drive fits standard 3.5-inch bays with maximum dimensions of 147.00mm length, 101.85mm width and 26.11mm height. It requires a SAS 12Gb/s host bus adapter or backplane; SATA-only controllers will not work. Helium side-sealing weld technology adds handling robustness, but the drive is not suited for non-enterprise enclosures lacking adequate cooling or SAS infrastructure.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $342.99
Pricier than about 86% of the 4,938 comparable items (median $107.99).
Total capacity 16 TB
Higher than about 92% of the 2,372 comparable items (median 2 TB).
Price per TB $21.44 per TB
Cheaper than about 92% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineExos X16
Model nameST16000NM004G
Total capacity16 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory256 MB
Ports & slots
Interface typeSAS 12Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.11 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.91 kg
Package size305 × 254 × 203 mm

Other versions of this model

1 more in the same range

Questions about this item

How much heat and power does the 7200 RPM Exos X16 draw when running continuously in a server rack?

The drive uses a PowerBalance feature that optimises watts per terabyte, and its helium-sealed design lowers power consumption and weight compared to air-filled drives of similar capacity.

Which host controller or backplane must I already have to connect this SAS 12Gb/s drive?

You need a SAS controller or expander that supports 12Gb/s SAS links; the drive will also negotiate down to 6Gb/s or 3Gb/s if the backplane only supports those speeds.

Will this 3.5-inch 16TB helium drive fit and operate in a chassis built for earlier 3.5-inch 12TB air-filled drives?

Yes — it shares the standard 3.5-inch form factor with a 26.11mm height, 101.85mm width and 147.00mm length, so it fits the same drive bays and uses the same SAS power and data connectors.

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